CYP17A1 and polycystic ovary syndrome: Thus, the variants in ovarian and adrenal steroidogenesis synthesis genes such as CYPA1A, CYP11A1, CYP11B2, CYP17A1, CYP1A1, CYP21A2, CYP3A7, and CYP19A1 are involved in PCOS (Zhao et al., 2003; Esinler et al., 2008; Unsal et al., 2009; Reddy et al., 2014; Mykhalchenko et al., 2017).